Patent US3938530A successfully refreshed from Google Patents.
US3938530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Individual
•
Filing: 1974-11-15
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Granted: 1976-02-17
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Expires: 1994-11-15
Abstract
Abstract A retention-type catheter adapted to be inserted, through the urethra, into the urinary bladder of a medical patient; the catheter including--in unitary relation--a primary tube for drainage of the bladder, a secondary tube for irrigation of the bladder, and an initially contracted but expansible retainer formed in the primary tube adjacent the tip thereof, the secondary tube being longitudinally movable relative to the primary tube and arranged to further serve as an exteriorly manually actuated, pull-push element operative to cause expansion and contraction of such retainer, respectively.
Inventors
- 👤 Louis S. Santomieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:56
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M25/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
308 words
In a soft, flexible, retention-type catheter which includes a primary tube having an outer-end tip, and an initially contracted but expandable retainer formed in the tube adjacent the tip and adapted to be expanded and contracted by rearward and forward movement, respectively, of said tip; a relatively smaller diameter secondary tube disposed within the primary tube in longitudinally movable relation, the forward end of the secondary tube being secured to the tip and open thereat, and means connected to the rear end of the secondary tube exteriorly of the primary tube adapted for manipulation to impart such rearward and forward movement to the tip through the medium of said secondary tube serving as a pull-push element; the primary tube including, in communication and adjacent its rear end, a short, lateral, rearwardly divergent guide tube, the secondary tube extending into the guide tube in slidable relation, and said means being a head on the secondary tube at its rear end; said secondary tube initially leading out of the guide tube through a side opening therein intermediate its ends and with the head disposed exteriorly of and to the side of said guide tube, the tip then being in forwardly moved position with the retainer contracted, the guide tube having an open-ended, longitudinal slot therein extending from its rear end to such side opening, the slot being of a width to normally prevent the related portion of the secondary tube to move through such slot, the guide tube being flexible and resilient whereby to permit its manipulation to widen the slot sufficient for said related portion of the secondary tube to pass rearwardly through the slot to a position extending longitudinally within the guide tube and with the head abutting the rear end of said guide tube, the tip then being in a rearwardly moved position with the retainer expanded.
Claim 2
Dependent Claim
308 words
In a soft, flexible, retention-type catheter which includes a primary tube having an outer-end tip, and an initially contracted but expandable retainer formed in the tube adjacent the tip and adapted to be expanded and contracted by rearward and forward movement, respectively, of said tip; a relatively smaller diameter secondary tube disposed within the primary tube in longitudinally movable relation, the forward end of the secondary tube being secured to the tip and open thereat, and means connected to the rear end of the secondary tube exteriorly of the primary tube adapted for manipulation to impart such rearward and forward movement to the tip through the medium of said secondary tube serving as a pull-push element; the primary tube including, in communication and adjacent its rear end, a short, lateral, rearwardly divergent guide tube, the secondary tube extending into the guide tube in slidable relation, and said means being a head on the secondary tube at its rear end; said secondary tube initially leading out of the guide tube through a side opening therein intermediate its ends and with the head disposed exteriorly of and to the side of said guide tube, the tip then being in forwardly moved position with the retainer contracted, the guide tube having an open-ended, longitudinal slot therein extending from its rear end to such side opening, the slot being of a width to normally prevent the related portion of the secondary tube to move through such slot, the guide tube being flexible and resilient whereby to permit its manipulation to widen the slot sufficient for said related portion of the secondary tube to pass rearwardly through the slot to a position extending longitudinally within the guide tube and with the head abutting the rear end of said guide tube, the tip then being in a rearwardly moved position with the retainer expanded.
Claim 3
Dependent Claim
151 words
In a soft, flexible, retention-type catheter which includes a primary tube having an outer-end tip, an initially contracted but expandable retainer formed in the primary tube adjacent the tip and adapted to be expanded and contracted by rearward and forward movement, respectively, of said tip, a relatively small diameter secondary tube disposed within the primary tube in longitudinally movable relation, the forward end of the secondary tube being secured to the tip and open thereat, and the rear end of the secondary tube exteriorly of the primary tube being adapted for manipulation to impart such rearward and forward movement to the tip through the medium of said secondary tube serving as a pull-push element; the improvement characterized by an internal tip formed in the primary tube adjacent but short of the outer-end tip, the internal tip having a central opening therein through which the secondary tube extends in slidable, guided relation.
Claim 4
Dependent Claim
151 words
In a soft, flexible, retention-type catheter which includes a primary tube having an outer-end tip, an initially contracted but expandable retainer formed in the primary tube adjacent the tip and adapted to be expanded and contracted by rearward and forward movement, respectively, of said tip, a relatively small diameter secondary tube disposed within the primary tube in longitudinally movable relation, the forward end of the secondary tube being secured to the tip and open thereat, and the rear end of the secondary tube exteriorly of the primary tube being adapted for manipulation to impart such rearward and forward movement to the tip through the medium of said secondary tube serving as a pull-push element; the improvement characterized by an internal tip formed in the primary tube adjacent but short of the outer-end tip, the internal tip having a central opening therein through which the secondary tube extends in slidable, guided relation.
Claim 5
Dependent Claim
49 words
A catheter, as in claim 2, in which the internal tip is disposed in substantially the zone of the retainer, the latter when expanded permitting of liquid flow therethrough into the primary tube and to said intermediate tip, and such internal tip being hollow and having liquid-flow holes therein.
Claim 6
Dependent Claim
39 words
A catheter, as in claim 3, in which the outer-end tip is formed with longitudinal "flashback" openings therethrough; the internal tip, from the openings therein and forwardly thereof, being free of and having liquid-flow clearance with the primary tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |